1
answer
0
watching
471
views
17 Nov 2019
Draw the sigma-only MO diagram for the square planar molecule [PtCl_4]^2- using the following steps: Consider the 5s, 5p, and 4d orbitals: Draw pictures of each bonding and non-bonding orbital formed upon interaction with the 4 chlorine atoms (9 pictures total). Label these as "bonding" or "non-bonding" and with their orbital parentage (5s, 5p_x, 5p_y, 5pz)4d_z2, 4d_xy, etc). Consider sigma-bonding interactions only. If you notice that a combination of ligand orbitals (an LCAO) is used for interactions with two different metal-based orbitals, this is a situation where mixing will occur and you should make a note of that. Construct an MO diagram, putting the Pt AOs on the left (4d orbitals lowest in energy) and the 4 Cl AOs on the right (these will be lower in energy than the Pt orbitals). Label each orbital as nb, sigma or sigma*. Fill in the correct number of electrons (16...4 for each Cl, 10 for Pt, and 2 for overall 2- charge). Label and describe the HOMO(s) and the LUMO(s) of this molecule, telling us what atom the orbital is centered on, whether it has s, p, or d character (or a combination thereof), and whether it is bonding, antibonding, or non-bonding.
Draw the sigma-only MO diagram for the square planar molecule [PtCl_4]^2- using the following steps: Consider the 5s, 5p, and 4d orbitals: Draw pictures of each bonding and non-bonding orbital formed upon interaction with the 4 chlorine atoms (9 pictures total). Label these as "bonding" or "non-bonding" and with their orbital parentage (5s, 5p_x, 5p_y, 5pz)4d_z2, 4d_xy, etc). Consider sigma-bonding interactions only. If you notice that a combination of ligand orbitals (an LCAO) is used for interactions with two different metal-based orbitals, this is a situation where mixing will occur and you should make a note of that. Construct an MO diagram, putting the Pt AOs on the left (4d orbitals lowest in energy) and the 4 Cl AOs on the right (these will be lower in energy than the Pt orbitals). Label each orbital as nb, sigma or sigma*. Fill in the correct number of electrons (16...4 for each Cl, 10 for Pt, and 2 for overall 2- charge). Label and describe the HOMO(s) and the LUMO(s) of this molecule, telling us what atom the orbital is centered on, whether it has s, p, or d character (or a combination thereof), and whether it is bonding, antibonding, or non-bonding.
Collen VonLv2
1 Jun 2019